package pack0624;

public class StudentDemo {
    public static void main(String[] args) {
        Student a = new Student();
        a.show();
        Student a1 = new Student("林青霞");
        a1.show();
        Student a2 = new Student(30);
        a2.show();
        Student a3 = new Student("江疏影",30);
        a3.show();
    }
}
